Step 4: FDS roms can be placed in the same folder as NES/Famicom roms. Make sure they are unzipped and have the extension. The folder structure should look like: disksys.rom Step 2: Create a folder on micro-SD card called 'BIOS' and place disksys.rom in that folder. If capital letters don't work try lower-case. Some people have had to capitalize it other systems seem to prefer lowercase. Make sure it is named 'disksys.rom' and not in a zip file. I have not been able to get actual FDS connected and working to a Retro Freak so no ROM dumping and no save game transfers. It requires a BIOS to run but is fairly simple to add compatibility to the Retro Freak and have one more system emulated. The Famicom Disk System is a Japan only addon system for the Japanese Famicom. How to get Famicom Disk System (FDS) working Hopefully, this process will make it easier for those attempting them in the future.
I just wanted to put all the info in one spot with simple step-by-step instructions. I realize most of this info is available from various sources (including these forums).
